Home / 21,110.38-29,129.84-12,158.26

Finding the Fourth Proportional to 21,110.38, 29,129.84 and 12,158.26

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Solution

The fourth proportional to 21,110.38, 29,129.84 and 12,158.26 is: 16,776.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.38 : 29,129.84 = 12,158.26 : x
  2. Step 2: Convert to fraction form
    21,110.38/29,129.84 = 12,158.26/x
  3. Step 3: Cross multiply
    21,110.38x = 29,129.84 × 12,158.26
  4. Step 4: Simplify right side
    21,110.38x = 354,168,168.48
  5. Step 5: Solve for x
    x = 354,168,168.48/21,110.38
  6. Step 6: Final answer
    x = 16,776.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.